What the IS200HFPAG2ADC Fan and Transformer Board Provides

Listed here as a Fan and Transformer Board, the IS200HFPAG2ADC is GE's high-frequency AC/fan power supply for the Speedtronic Mark VI. The "fan and transformer" description is a fair one: the board carries two transformers and produces the high-frequency AC that runs the cabinet cooling fans, while also supplying the low-voltage rails that keep the control section alive. It sits in the IS200 Mark VI family but performs a power role rather than a signal-processing one, which shapes how you should troubleshoot it.

Power conversion and cooling in one board

The IS200HFPAG2ADC takes an AC or DC input across four stab-on input connectors and converts it to the outputs the cabinet needs, documented as 48 VAC, 52 VAC, 48 VDC, and 17.7 VAC through eight output plug connectors, with total output rated not to exceed 90 VA. Supporting hardware on the board includes two transformers, two heat sinks, three high-voltage capacitors, a metal-oxide varistor, four protective fuses, and two LEDs that show the state of the voltage outputs. GE typically locates the board in the drive cabinet near a board rack or a fan enclosure.

Before ordering: separating a board fault from a fan or fuse fault

The most common mistake with an HFPA is replacing the board when the real problem is downstream. Because this unit feeds fans and control power, its symptoms imitate several cheaper faults. Check these first:

• Fans and airflow. An over-temperature alarm or a stalled fan is often the fan motor or its wiring, not the supply. Spin-test or meter the fan and inspect its connector before you suspect the board.
• The four fuses. One open fuse can silence a single output or fan circuit. If a fuse blows again immediately, you have a shorted load, and the board is likely innocent until that short is cleared.
• Input presence. Confirm the incoming AC or DC is actually arriving at the stab-on connectors. A tripped upstream breaker or a loose feed looks identical to a failed converter from the control side.
• Output LEDs. Use the two on-board indicators to see which outputs are live. They quickly separate a whole-board failure from a single-rail issue.

If the fans, fuses, feed, and LEDs all check out and an output is still missing, the IS200HFPAG2ADC itself becomes the likely cause and a replacement is justified.

Decoding the HFPA G2 suffix

Read the number in segments: IS200 is the Mark VI IS200 board series, HFPA is the high-frequency AC/fan power supply function, G2 is the functional group, and A plus the DC suffix identify the hardware revision and coating variant. The suffix is not cosmetic when it comes to fit and form, so match it to the board you are removing. For a full walk-through of the Speedtronic scheme, see our GE Speedtronic Part Number Decoder.

Cross-references and companion Mark VI hardware

Within the cabinet, the HFPA supports the rack and the VME cards that depend on cooling and control power. You can review neighbouring parts in the GE Mark VI IS200 Boards collection or the wider GE Speedtronic Turbine Control Boards range. Teams maintaining a mix of generations may also find our Mark V vs Mark VI: DS200 to IS200 comparison useful when planning upgrades and spares.

Quote checklist

Give us the following so we can confirm the right board quickly:

• Full part number and suffix as printed (IS200HFPAG2ADC), plus any additional revision markings
• A photo of the board label
• The turbine model and the cabinet or lineup it serves
• Quantity, and whether you are stocking a spare or covering an outage

Get a quote on this new-surplus HFPA

This IS200HFPAG2ADC is offered as new-surplus, factory-packaged stock, backed by the warranty listed below. Use Request a Quote and we reply within 24 hours with availability and lead time. Shipping is worldwide on a DDP basis, and we accept purchase orders from qualified buyers. Let us know your timeline and we will prioritize accordingly.